Question

What does the exponent of the regression coeffcient, exp(B), represent in a logistic regression model?

What does the exponent of the regression coeffcient, exp(B), represent in a logistic regression model?

Homework Answers

Answer #1

let a linear regression equation be

y=b0+b1x1+b2x2+.....................bkxk   .

Linear regression is based on Least Square estimates where Logistic regression is based on Maximum Likelihood Estimate such that it maximises the probaility of Y given X(likelihood).

The logistic Regression equation

Logit(p)=b0+b1x1+b2x2+.....................+bkxk  

Where Logit(p)=Log(p/1-p)

(p=probability of the dependent variable equalling a "succcess" or "event")

Taking exponential boththe sides of

Logit(p)=b0+b1x1+b2x2+.....................+bkxk   we get

Tis is how the exponent of the regression coeffcient, exp(B), represent in a logistic regression model

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